Goodwill And Intangible Assets (Goodwill) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Jul. 31, 2016	Jul. 29, 2018	Jul. 30, 2017
Goodwill [Line Items]
Beginning Balance			$ 2,115	$ 2,263
Goodwill, Acquired During Period			3,068
Goodwill, Impairment Loss			(540)	(191)
Foreign currency translation adjustment			(63)	43
Ending Balance		$ 2,263	4,580	2,115
Americas Simple Meals and Beverages [Member]
Goodwill [Line Items]
Beginning Balance			780	775
Goodwill, Acquired During Period			202
Goodwill, Impairment Loss			0	0
Foreign currency translation adjustment			(4)	5
Ending Balance		775	978	780
Global Biscuits and Snacks [Member]
Goodwill [Line Items]
Beginning Balance			795	757
Goodwill, Acquired During Period			2,866
Goodwill, Impairment Loss			0	0
Foreign currency translation adjustment			(59)	38
Ending Balance		757	3,602	795
Campbell Fresh [Member]
Goodwill [Line Items]
Beginning Balance	[1]		540	731
Goodwill, Acquired During Period			0
Goodwill, Impairment Loss			(540)	(191)
Foreign currency translation adjustment			0	0
Ending Balance	[1]	731	0	540
Goodwill, Accumulated Impairment Loss		$ (106)	$ (837)	$ (297)

[1] The balance of goodwill is reflected net of accumulated impairment charges of $837 as of July 29, 2018, $297 as of July 30, 2017 and $106 as of July 31, 2016, respectively, related to the Bolthouse Farms carrot and carrot ingredients reporting unit, the deli reporting unit, and the Bolthouse Farms refrigerated beverages and salad dressings reporting unit.